A coating applied to face material to increase opacity. A coating applied to prevent migration of ink, adhesive, or other substances through the face material. A sealing coat.
A coating applied to the face material on the side opposite the printed surface to provide increased opacity to the face material and/or to prevent migration between adhesive and the face material and/or to improve anchorage of adhesive to face material.
Coating used to isolate a coating system from the surface to which it is applied or from a previous coating. Permits to increase adhesion or to insure compatibility.